RE71RS in 255/35r19 and 285/35/19 just showed up from tirerack. Got the heat cycling option for the first time, too. Can't wait to try these for autocross and track days this year.

 

MSR Houston, COTA, Eagle's Canyon.
Ambient 50-95. I try to avoid too much track driving in the middle of Houston summer.

 

Track tire question across all brands: What is the wear rate front to rear on GT4’s?

Will be tracking a GT4 this year after 11 years in a GT3 where rears wore faster, but not twice as fast.

As long as I’m asking, what’s the relative wear rate in rotors and pads?

 

In my case front and rear tires wear at about the same rate. Ferodo 3.12 wear about 2 front for 1 rear. Stock rotors 2 fronts for 1 rear. YMMV

Peter

 

85Gold nailed pad wear very accurately. For tires I get two events before they need changing. Depends what tires your running but everything is basically dead by 25 HC. Front shoulders will show a lot of wear, rears always have tons of tread left but are dead from the heat.

 

Need to loosen up the rear and drift more.

Concur on the 25 HC metric.

Peter

 

I'm driving a CGTS 4.0, and for tires (Michelin SC2), I've been getting 2 rears for 1 front tire

For rotors, I'd been getting 2 fronts for 1 rear. Middle of 2023, I changed to AP racing " J-Hook" rotors in the front, and the wear has been remarkably good. On the stock front rotors, I used them for a year and went through two sets in 798 track miles. Both sets were within the 2mm wear limit, but they were badly cracked.

I've been using the AP racing rotors for the last half of 2023, and after 627 track miles, there's still not even a hint of a lip from wear on them. I stayed with the OEM rear rotors.

For pads, I use Pagid RS29 Yellows, and it's about a 2 front to 1 rear ratio. In those same 627 track miles during the last half of 2023, I've worn slightly less than 2mm off the front pads and less than 1mm off the rear pads.

 

When the corner workers are taking their after lunch nap why not

 

Tyre wear is heavily, HEAVILY dictated by your alignment. If you have toe out in the front then expect fronts to wear a lot faster.

I found once I switched to zero toe in the front that my wear evened out to almost equal.

Brakes wear fairly evenly front to rear, slightly more wear in front. More evidence of heat stress in the front rotors so expect them to need replacing before rears. I get about 10 track days out of a set of pads and 20 out of a set of rotors. Slight bias towards front wear but kinda makes sense to replace all at once.

 

In the 2023 Tire thread, I had asked about the Bridgestone Potenza Race. This tire was the optional high performance tire option OE on the Lamborghini Huracan STO track special. It was only available initially in the sizes to fit the Huracan STO, which coincidentally has 8.5x20" and 11x20" wheels just like our cars do. I speculated that they should be pretty good given their OE Lambo purpose + Bridgestone's decade long excellence in making great high performance street tires.

Well now the Bridgestone Potenza Race is available in a handful of non-STO sizes too. And GRM tested them! GRM's tire tests have historically been rigorous and excellent. The author and tire tester is Andy Hollis, who is about as good/consistent tire tester as you will get short of a pro race car driver.
GRM found the Bridgestone Potenza Race to be a tad slower than the Bridgestone Potenza re71RS in a track test.
https://grassrootsmotorsports.com/ar...riented%20tire.

In 225/45/17 on a Mazda Miata, the best laps were:
Bridgestone Potenza Race 1:27.6
Bridgestone Potenza re71RS 1:26.9

Now it is possible that the OE STO sized Potenza Race perform differently than the Miata-sized ones. It's not unprecedented for the same model of tire, especially OE models, to have a different tire compound or even structure. But there you go. Someone actually tested them...

 

Not available in OEM or -1 OEM sizing. Even more expensive than OEM Dunlops.

 

You can say that again! A 265/35-19 is $502!

 

I have been running the AD09 on stock wheels for 3 track days now and I am very impressed. They provide excellent steering precision and the break away in a predictable manner. They do need about a lap to get heat into them but after that they are very consistent throughout a 25min session assuming that you keep the hot pressure around 33-34 PSI, above that they start to get greasy. Talking to my local tech that that works mainly on Porsche and BMW track cars it seems like people are getting about 45 heat cycles out of these with lots of tread still left which I would be more than happy with.

 

That's great to hear. I've changed my original plan of going with CR-S v2, to now going with OEM sizing for AD09. It would have been nice if they were as fast as the A052, but you have to give something to get something, and more longevity and more sessions is worth quite a bit for me. Just gotta push a bit harder for those PBs.

 

Vegas also, will have to hunt you down at the POC and PCA events for tips.

May need to start with the instead of RE71RS. At my skill level consistency and longevity are the most important.